11911982 has 16 divisors (see below), whose sum is σ = 18802800. Its totient is φ = 5653144.

The previous prime is 11911981. The next prime is 11911987. The reversal of 11911982 is 28911911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11911981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201869 + ... + 201927.

It is an arithmetic number, because the mean of its divisors is an integer number (1175175).

Almost surely, 2^11911982 is an apocalyptic number.

11911982 is a deficient number, since it is larger than the sum of its proper divisors (6890818).

11911982 is an frugal number, since it uses more digits than its factorization.

11911982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 90 counting only the distinct ones).

The product of its digits is 1296, while the sum is 32.

The square root of 11911982 is about 3451.3739293215. The cubic root of 11911982 is about 228.3817217970.

The spelling of 11911982 in words is "eleven million, nine hundred eleven thousand, nine hundred eighty-two".